Motor.



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IIIIIIIIIIIIIIIII FIG-29,1913.

wmw. Patented Oct. 19, 1915.

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MOTOR. APPLICATION H LED DEC-29. I913- Patented 06. 19, 1915 2 SHEEIS-SHEET 2.

DANIEL S. WAUGH, 01? DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELA- WARE.

MOTOR.

Specification of Letters Patent.

Patented ea.- ia, 1915.

Application filed December 29, 1913. Serial No, 809,236.

a citizen of the United States, residing at portion of the sleeve Denver, in the county of Denver and State of Colorado, have inventednew and useful Improvements in Motors, of which the following is a specification. I

The present invention relates more particularly to means for delivering fluid for cleansing purposes to motor-operated tools, said means being preferably incorporated with and forming a part of the motor mechanism.

The primary object is to provide simple, novel and practicalv means by which both liquid and gaseous fluid can be delivered to the tool separately or simu taneously, as desired, so that the highest degree of efficiency may be obtained in different grades of work.

The preferred embodiment of the invention is illustrated in the accompanying drawin wherein Figure 1 is a longitudinal sectional view through a motor, showing the improved means therein. Fig. 2 is a rear-elevation of the same. Fig. 3 is a cross sectional view substantially on the line 33 of Fig. 1. Fig. 4 is a detail sectional view of a diagrammatic character, illustrating the action of the liquid and gaseous fluid to prevent leakage at the joint.

Similar reference numerals designate corresponding part-s in all the figures of the drawings.

In the embodiment illustrated, a cylin \ll-r member 4 is employed, in which is jour-.

naled a. rotatable chuck sleeve 5, having a bushing G'that receives a tool, as 7, the said mol being provided with a longitudinal bore h. through. which the cleansing fluid is adapted to pass. A piston9 reciprocates in the cylinder member, being located in the rear v The reciprocation of this piston effects a step-by-step rotation of the sleeve 5 through the medium of mechanism desi niated generally by the reference numeral 10, which mechanism 79c?- 80 is thought not to constitute a part of the present invention. and is therefore believed not to require any further explanation; It is made the subject-matter of a separate application. Carried by the sleeve 5-and located in advance of the piston 9, is a. tappet 11,

the rear end of which is adapted to be struck will be readily understood. The tappet 11, as clearly shown in Fig. 1,

is provided with an internal chamber 12, which has a reduced discharge port 13 op'ening through the front end thereof in line with the bore 8 of the tool 7, so that said chamber is thus in communication with the said bore. A bore 14 is also formed in the rear portion of the tappet 11 to snugly r ceive the front end portion of a liquid conducting tube 15 that extends longitudinally through the piston 9 and terminates in the internal chamber 12 in spaced relation to the front end thereof. This tube 15 is suitably fixed at its rear end in the rear cylinder axial bore 21 to receive the rear terminal of the tube, and is furthermore provided with lateral ports 23 communicating with the bore of the tube, andwith an annular groove 24 formed in the rear end of the pocket Wall.

This groove 24, in turn, is in communication with a supply channel 25 through the medium of a port 26, to which is connected a coupling 27, by means'of which a Water supply pipe can be attached to the machine. A suitable valve (not shown) is located at a convenient point in the sup-ply pipe for controlling the passage of Water therethrough.

Gaseous fluid is employed for operating the piston 9, and this fluid is suppliedthrough' a pipe 28 to a valve chamber 29,'in which is located a rotatable throttle valve 30 having a main passage 31 controlling the supply of fluid to an automatic distributing valve, designated generally by the reference numeral. 32. From this valve, passages 33 lead to the interior of the cylinder member on opposite sides ofxthe piston. So far as this part of the mechanism is concerned, it

is believed suflicient to state that when the valve is in the position shown in Figs. 1 and 3, the fluid will be alternately directed through the passages 33 to opposite sides of the piston, to cause the reciprocation of thesame, and when the valve 30 has turned so that its port 31 is out of communication with the distributing valve'mechanism, the

' piston'D will be inoperative.

Leading from the valve chamber 29 and formed in the wall of the cylinder member,

is a passageway 34, the inlet end 35 of which is controlled by'the throttle valve 30, said throttle valve having a port 36 opening from of the sleeve 5 which contains the tappet 11.

This portion of the sleeve, as clearly shown in Fig. 1, is provided with a plurality of lateral ports 39- communicating with the groove 38, and with an annular groove 40 formed in the periphery of the tappet 11. From theannular grove 40, lateral ports 41 communicate with the rear portion of the internal chamber 12 in rear of the front end of the tube 15, which projects into said chamber'12. I

Briefly described, the operation of the machine is as follows: During the reciproca-v tion of the piston 9, the chuck sleeve 5 will be rotated and will rotate the tool 7 with it in a manner well understood. 'While the machine is in operation, the channel 37 will permit a portion of the gaseous fluid to flow through the ports 36 and 35 into the passageway 34, and this gaseous fluid, passing through the groove 38, ports 39, groove 40 and ports 41, will gain access to the internal chamber 12, and thence through the port 13, into the bore 8 of the tool 7 It is sometimes desirable to deliver this cleansing fluid through the tool before the machine is thrown into operation, and this can be accomplished because of the channel 37 in the throttle valve, which will open communication between the supply of motive fluid and the passageway 34, before the port 31 is brought into communication with the distributing valve mechanism.-

Whenever it is desired to supply liquid to the tool, it is only necessary to open the water supply valve, whereupon water will flow through the coupling 27, passageway 25, ports 26 and 23, into the tube 15 This water will therefore discharge from the tube .into the chamber 12. and be delivered through the port 5 into the bore 8 of the tool 'tendency to-break off the tube.

ment, either liquid or gaseous' fiuid can be delivered to the tool, while the'same is being rotated, but one of the most important functions is performed by the structure when the .water is being delivered. To make clear through a tube extending thereinto in orderto prevent leakage of the liquid around the inner or shank end of the bit. Certain defects, however, arise with such a. structure.

For example, when the chuck becomes worn, it allows considerable lateral play to the shank end of the drill bit, and this has a Also after considerable service, the hole in the shank end of the drill bit will have a tendencyto bur and close up. As the drill steel is being constantly rotated, this bur furthermore has a tendency in a short time to cut off the tube. As a-result, the machine has to be taken apart, and a new tube inserted. Byterminating the tube in the tappet, as disclosed, this difiiculty is overcome, but then arises another trouble, namely, the passing of the water, into the drill bit, without material leakage. This may possibly besuccessfully accomplished where the shank end of the bit is perfectly square, so that it will come in' even contact with the base of the tappet, but blacksmiths often are careless, and the shank ends are not apt to be true, and unevenness of course results in a space in the joint between the drill bit and tappet through which leakage ordinarily would oc-' cur. This, however, is overcome in the present structure, and in order to make the operation clear, attention is invited to Fig. 4. It will be noted that inasmuch as the air is introduced behind the end of the water tube, and completely around the same, the column of water is surrounded or incased by a confining tubular column of air, which incloses it until it has passed into the drill bit. This tube of air bridges the joint between the tappet and drill bit, and while a portion of the air may escape, experience has demonstrated that leakage of water can be quite completely prevented and in any event, is very materially reduced.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will'be un- I IBM the combination with a cylinder member and a piston operating therein, of a tappet in advance of the piston, means terminating in the tappet for delivering cleansing liquid longitudinally through the tappet, and means for introducing a cleansing fluid later-- ally into'the tappet around the liquid-delivering means.

2. In mechanism of the character set forth, the combination with a cylinder member and a piston operating therein, of a tappet in advance of the piston, a liquid-conducting tube extending through the piston and terminating in the tappet, and means for introducing a cleansing fluid laterally into the tappet around the tube.

3. In mechanism of the character set forth, the combination with a cylinder member and a piston operating therein, ofa tappet in advance of the piston having an internal chamher opening through the front end and a lateral port communicating with the chamber, a fluid conducting tube extending through the piston into the chamber and having its front end spaced from the walls thereof and having a snug fit in the rear portion of the tappet, and means for supplying gaseous fluid to the lateral ports.

4. In mechanism of. the character set forth,

the combination with a cylinder member and a piston operating therein, of a rotatable chuck sleeve member mounted in the front end of the cylinder member, one of said members having an annular groove and theconducting tube extending longitudinally through the piston and into the internal chan'iber of the tappet;

In mechanism of the character described, the combination with a cylinder member and a piston operating therein, of a tappet located in advance of the piston, said tappet having an internal chamber provided with a: reduced outlet opening through its front end, said tappet furthermore having lateral ports communicating with the rear portion of the internal chamber, means for supplying a cleansing fluid to the ports, and a lluidcomlucting tube extending longitudinally through the piston and into the internal chamber, said tube terminating short of the front end of said chamber.

(3. In mechanism of the character set forth, the combination with a drill bit having a bore, ol means terminating short of the drill bit for 'n'ojecting a stream of liquid into the bore of the bit, and means for surrounding the projected stream of liquid with a'confining column of gaseous fluid under pressure.

7. In mechanism of the character set forth, the'combination with a drill bit having a bore, of a liquid-conducting tube terminating short of the drill bit for directing a stream of liquid toward the bore of the bit, and means for surrounding the projected stream of liquid during its passage from the tube to the drill bit with a column o gaseous fluid under pressure.

8. In mechanism of the character'set forth, the combination with a tappet having a bore,

of a drill bit in advance of the tappet also having a bore, means for introducing liquid into the bore of the tappet, and means for surrounding the liquid, so introduced, with gaseous fluid under pressure during its passage across the joint between the tappet and the drill bit.

9. In mechanism'of the character set forth,

the combination with a tappet having a bore,

of a drill bit in advance of the tappet also having a bore, a liquid-conducting tube terminating in the bore of the tappet, and

means for introducing gaseous fluid into the tappet around the end of the tube and forming a column of said fluid around the liquid discharged. from the tube.

10. In mechanism of the character set forth, the combination with a drill bit having a bore, of a piston for operating on the drill bit, means terminating short of the drill bit for projecting liquid towardthe bore thereof, and means for surrounding the projected liquid with a column of gaseous fluid under pressure and directing said column toward the drill bit.

11. In mechanism of the character set forth, the combination witha drill bit having a bore, of a piston for operating on the drill bit, means extending through the piston and terminating short of the drill bit for projecting liquid toward the bore thereof, and means for surrounding the projected liquid with a column of gaseous fluid under pressure and directing said colulnn toward the drill bit.

13. In mechanism of the character. set

forth, the combination with a drill bit having a bore, of a piston for operating on the drill bit, a tube extending through the piston and terminating short of the drill bit for projecting liquid toward the bore theresurrounding the discharge end of the tube of, and a tappet interposed between the pis- In testimony whereof I have hereunto set ton fend the driii hit for transmitting the my hand in presence of two subscribing wit 1O blow from the former to the letter, said nesses. tappet having a gaseous fluid delivery port DANIEL s. WAUGH.

and producing agaseous fluid column that is Witnesses: ProJected toward the drill bit and surrounds W. H. Lnoxsnu,

the projected liquid from the tube. A. W. OAKES. 

